采用半经典理论讨论了同一抽运源抽运的两个独立光学参量振荡腔（ＯＰＯ）所产生的压缩态光场的四阶量子干涉效应．结果表明：在ＯＰＯ振荡阈值处，输出光场压缩度最高但四阶量子干涉最弱，条纹可见度为３３３％，远离阈值时干涉越来越强 The fourth order quantum interference effect of the squeezed state light field generated by two independent optical parametric oscillating cavities (OPOs) of the same pumping source is discussed using the semi-classical theory. The results show that at the OPO oscillation threshold, the output light field has the highest degree of compressibility and the fourth-order quantum interference is the weakest, with a fringe visibility of 333%. The interference is getting stronger and stronger when it is far away from the threshold